16298be6a3
This CL adds epoll monitoring socket(in backend_client) for vhost_user_frontend. The monitored event fd is created from backend_client's close_notifier. If the connection is broken, it means vhost_user device exits unexpectedly, the crosvm should panic and exits. BUG=b:369513363 TEST=start vhost_user device & kill the device & verified the crosvm panic Change-Id: I1b82aadc8d924978fe03d87a306f199781b428e3 Reviewed-on: https://chromium-review.googlesource.com/c/crosvm/crosvm/+/5889431 Reviewed-by: Noah Gold <nkgold@google.com> Commit-Queue: Yuan Yao <yuanyaogoog@chromium.org> Reviewed-by: Frederick Mayle <fmayle@google.com> |
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vHost
A pure rust library for vhost-user. This is a fork of rust-vmm/vhost.
The vhost-user protocol aims to implement vhost backend drivers in userspace, which complements the ioctl interface used to control the vhost implementation in the Linux kernel. It implements the control plane needed to establish virtqueue sharing with a user space process on the same host. It uses communication over a Unix domain socket to share file descriptors in the ancillary data of the message.
The protocol defines two sides of the communication, frontend and backend. Frontend is the application that shares its virtqueues, backend is the consumer of the virtqueues. Frontend and backend can be either a client (i.e. connecting) or server (listening) in the socket communication.